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  • #1

    The Beast just dies

    Hey Everbody,

    I think I may have seen this to before but here goes..

    If I start out with the petcocks set on Pri after riding about 2 miles give or take. It sounds like half the engine starts to shutdown and then the whole thing dies. I coast to a stop switch it to res and choke it and VROOM back to life and away I go.

    I havent made any mods to the carbs as of yet. I dont see any messed up lines.

    I am going to change to those sweet Custom Cones and replumb the beast but that is up coming.

    Any Ideas..

    In case anybody else is going to be in Virginia on the 27th there is a ride put on by the Blue Knights (teddy Bear ride) It is usually Fun...
    Madness comes from within.

    78 XS 1100 E (at Birth) "Madness"
    79 XS1100 parts bike "hunk of junk"
    83 Sportster "Lunacy"
    72 Shovel "Dark Shovel"
    Tags: None
  • #2
    ???

    How long have u had the bike , did this just start or has it always done it ? Does it run alright on reserve or run , why are u on prime?Could be plugged petcock screens, could be plumed wrong etc need more info to be any help. ......MITCH
    Doug Mitchell
    82 XJ1100 sold
    2006 Suzuki C90 SE 1500 CC Cruiser sold
    2007 Stratoliner 1900 sold
    1999 Honda Valkyrie interstate
    47 years riding and still learning, does that make me a slow learner?

    Comment

    • #3
      Hey Mitch,

      I have had the bike about 3 weeks. I have done the maintence stuff just to make me feel better.

      Oil, Brake Fluid etc.

      I am not sure if this was a problem before I bought the bike or not but it runs fine as long as it isnt on Pri. I have just been running it on res just to remove the hassle I just didnt want it to be a bigger issue than just silly stuff.

      I will let you know what happens.

      Thanks Mitch
      Madness comes from within.

      78 XS 1100 E (at Birth) "Madness"
      79 XS1100 parts bike "hunk of junk"
      83 Sportster "Lunacy"
      72 Shovel "Dark Shovel"

      Comment

      • #4
        routing

        Springer you might check out the maintence section under carbs then go to fuel hose routing just to make sure your octopuss is plumed right also check for vacume leaks to it as well just a thought ...MITCH
        Doug Mitchell
        82 XJ1100 sold
        2006 Suzuki C90 SE 1500 CC Cruiser sold
        2007 Stratoliner 1900 sold
        1999 Honda Valkyrie interstate
        47 years riding and still learning, does that make me a slow learner?

        Comment

        • #5
          Sweet Will do Thanks A Million.....
          Madness comes from within.

          78 XS 1100 E (at Birth) "Madness"
          79 XS1100 parts bike "hunk of junk"
          83 Sportster "Lunacy"
          72 Shovel "Dark Shovel"

          Comment

          • #6
            Are you sure?

            If you was reading it backwards that would be "off" and that would be your answer! Have you tried to run it on "off" yet? That could be prime! Dumber things have happend!
            Garry
            '79 SF "Battle Cat"
            outbackweld@charter.net

            Comment

            • #7
              i'd guess the PO maybe re-did the plumbing possibly capping off the prime? when you switch to prime you might have just enough fuel to make it a ways down the road. if you're getting 2 miles probalby not though.

              Comment

              • #8
                Dead Beast

                This reminds me of the one about the Big fish that got away...both guys saw it and one swears it weighed ten pounds and the other says five...so who's right?
                First of all...let's ASSume...the Po did NOTHING to the bike.
                REMEMBER that on PRI... fuel (should) flow even when the motor is NOT running.
                If it is a SPECIAL and it has the "octopus" and ALL lines are hooked up "correctly" Fuel WILL flow...on PRI. unless there is a "plug" in the lines.
                Now here's one to consider
                What do you consider the "PRI" position to be?...are you using the "pointer" (on the petcock) correctly?
                some guys think the "line" is the indicator...when in fact it's the "paddle"
                And since PRI and OFF sit directly accross from each other on the petcock...I'd be willing to bet that you are "reading" the indicator "backwards"
                Try this...put the "little arm" (the one you turn the petcock off-n-on with) straight down...and see how that works...
                If the Bike will not run...then put the little arm straight up...then see what happens...if it will not continue running...then there IS a problem somewhere

                Start with the "octopus" it is usually the source for problems...
                check it by removing the little vacum line from the manifold and leave the other end attached to the "octopus", with your mouth suck into the hose and hold the pressure for 10 or so seconds...if the pressure remains constant, the "FUEL Vacum Diaphram" (octopus) is good, if the pressure "bleeds" down...check the vacum hose for damage...replace as necessary...then re-check.
                If the pressure holds...check the "hose routing" and remember each fitting is "numbered" both on the "octopus & petcock"
                Find a number on one and follow that line to it's end and check that number...they should correspond
                All three manuals Factory/Clymer/Yamaha/ have xs-cellant diagrams showing the "correct routing diagrams" for the fuel system.:cool

                I hope that helps...Steve

                I don't wanna Pickle...I just wanna ride my MotoSickle"
                "ARLO GUTHRIE cir-1963"
                MO-N-STEVE
                '79 SF "MO's Missile"
                '79 SF "That Old Black Magic"
                '79 SF "the Tomato Can"
                '80 SG "The BEAST"
                '80 XS850-SG "STILETTO"
                '81 SH "The NEW KID"
                '76 CB 750 K5 "The Orphan"

                Comment

                • #9
                  Thanks Steve Awesome advice I will look at it tonight when I get home. I am going to pick up the Cones and new fuel lines on my way home. I will use the service manual that I have to replumb the beast. I will let you know what happens. I think it will be a good idea to replumb it anyway just to make sure it is right... Some of the lines look at little old so better safe than sorry.

                  After reading the other posts I checked to see what position it was in and the like.

                  I put "the little Paddle" on Pri same result. Turned it the opposite way and it runs fine. So off we go...
                  Madness comes from within.

                  78 XS 1100 E (at Birth) "Madness"
                  79 XS1100 parts bike "hunk of junk"
                  83 Sportster "Lunacy"
                  72 Shovel "Dark Shovel"

                  Comment

                  • #10
                    Fuel Lines

                    Springer,
                    The one AND only advise about fuel lines (that I'll give) is to pay attention as to the routing of the "feeder lines" (the ones going to the carbs)
                    when you lift the tank to do the work...
                    PAY CLOSE ATTENTION to how the lines pass under & through the air horns on the air box...because after you re-attach the lines and "drop" the tank down the last few inches, pinching is most likely to occur.
                    Most Specials go accross...then down between the middle horn... and up and out through the outside two air horns...to the petcock
                    This allows the fuel lines to "bend' in a gentle arc...and not
                    "pinch"
                    I (personally) use clear fuel line (most MC shops) that way THERE IS NO ARGUMENT....when someone asks (or you wonder)...
                    "DID YOU TURN THE GAS ON?"
                    or the best one..."I know there's gas in the tank but is it GETTING gas?"
                    Clear fuel lines will answer that for you

                    Now about those "cones" you do realise that they will most likely cause a "drop" in performance...as you will be modifing/ altering the Mass air flow...adding "cones" is usually used in conjunction with a " chambered pipe" to "decrease" exhaust flow (backpressure)
                    A Re-tune is usually required when installing ANYTHING that alters or modifies FUEL/AIR flow.
                    Think of it this way...so much in...so much out...change one...change the other...what goes in...MUST get out...at about the same rate...or your performance suffers

                    I myself would work on the bike untill it ran PERFECTLY...then consider (carefully) any modifications BEFORE I just "bolted" them on.
                    you may find that 90+ hp is plenty
                    and you can save your money...for more tires
                    Either way...I hope this helps
                    Good Luck...
                    Steve
                    "130mph sure is fun...I sure hope there ain't no Police around"
                    "ARLO GUTHRIE cir-1963"
                    MO-N-STEVE
                    '79 SF "MO's Missile"
                    '79 SF "That Old Black Magic"
                    '79 SF "the Tomato Can"
                    '80 SG "The BEAST"
                    '80 XS850-SG "STILETTO"
                    '81 SH "The NEW KID"
                    '76 CB 750 K5 "The Orphan"

                    Comment

                    • #11
                      Thanks Steve,

                      I was really doing the cone thing for look not horsepower. My plan was to make sure the bike ran as close to perfect as possible before doing that. With what you have told me in mind I will think much more on it before changing to cones.

                      When and if I change to cones I will be having the Carbs tuned to make sure they are on the money. I'm not the best wrench on the planet especially when it comes to carb tuning and transmissions. Everything else I can figure out pretty easy...

                      Thanks Again..

                      John
                      Madness comes from within.

                      78 XS 1100 E (at Birth) "Madness"
                      79 XS1100 parts bike "hunk of junk"
                      83 Sportster "Lunacy"
                      72 Shovel "Dark Shovel"

                      Comment

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